Method and device for transmitting and receiving signal in wireless communication system
The present disclosure relates to a method and device for transmitting and receiving a signal in a wireless communication system, and an operation method of a user equipment (UE) in the wireless communication system may include receiving, from a base station, configuration information related to carrier aggregation (CA), wherein the configuration information related to the CA includes information related to cross-carrier scheduling between a primary cell (PCell) and a secondary cell (SCell), performing configuration related to the CA, based on the configuration information related to the CA, monitoring a common search space (CSS) of the PCell on the PCell and monitoring a UE-specific search space (USS) of the SCell on the SCell, based on the performed configuration related to the CA, and receiving a physical downlink control channel (PDCCH), based on the monitoring.
1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling;
identifying whether information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell) is configured in the configuration information; and
in case that the information indicating that the PCell is scheduled by the SCell is configured, monitoring a physical downlink control channel (PDCCH) on the SCell and the PCell,
wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and
wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.
2 . The method of claim 1 , wherein the information indicating that the PCell is scheduled by the SCell includes a scheduling cell identifier (ID) corresponding to the SCell and a carrier indicator field (CIF) value corresponding to the PCell.
3 . The method of claim 1 , further comprising:
in case that the SCell is deactivated, stopping the monitoring of the PDCCH on the SCell.
4 . The method of claim 1 , further comprising:
in case that the SCell is deactivated, stopping a physical uplink control channel (PUCCH) transmission.
5 . The method of claim 1 , wherein the configuration information associated with cross carrier scheduling is included in configuration information for the PCell.
6 . A user equipment (UE) in a wireless communication system, comprises:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from a base station, a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling;
identify whether information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell) is configured in the configuration information; and
in case that the information indicating that the PCell is scheduled by the SCell is configured, monitor a physical downlink control channel (PDCCH) on the SCell and the PCell,
wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and
wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.
7 . The UE of claim 6 , wherein the information indicating that the PCell is scheduled by the SCell includes a scheduling Cell identifier (ID) corresponding to the SCell and a carrier indicator field (CIF) value corresponding to the PCell.
8 . The UE of claim 6 , wherein the processor is further configured to:
in case that the SCell is deactivated, stop the monitoring of the PDCCH on the SCell.
9 . The UE of claim 6 , wherein the processor is further configured to:
in case that the SCell is deactivated, stop a physical uplink control channel (PUCCH) transmission.
10 . The UE of claim 6 , wherein the configuration information associated with cross carrier scheduling is included in configuration information for the PCell.
11 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling, wherein the configuration information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell); and
transmitting, to the UE, a physical downlink control channel (PDCCH) on the SCell and the PCell,
wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and
wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.
12 . The method of claim 11 , wherein the information indicating that the PCell is scheduled by the SCell includes a scheduling Cell identifier (ID) corresponding to the SCell and a carrier indicator field (CIF) value corresponding to the PCell.
13 . A base station in a wireless communication system, comprising:
a transceiver;
at least one processor coupled with the transceiver and configured to:
transmit, to a user equipment (UE), a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling, wherein the configuration information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell); and
transmit, to the UE, a physical downlink control channel (PDCCH) on the SCell and the PCell,
wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and
wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.